CVE-2017-20233
MEDIUMHirschmann HiLCOS Layer-2 Firewall Multicast Broadcast Traffic Bypass
Title source: cnaDescription
Hirschmann HiLCOS products OpenBAT, BAT450, WLC, BAT867 contains a firewall filtering vulnerability that fails to correctly filter IPv4 multicast and broadcast traffic when management IP address filtering is disabled, allowing configured filter rules to be bypassed. Attackers with network access can inject or observe multicast and broadcast packets that should have been blocked by the firewall.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
https://assets.belden.com/m/11a07596f0bf1018/original/Security-Bulletin-IPv4-Multicast-HiLCOS-Layer-2-Firewall-BSECV-2017-03.pdf
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/hirschmann-hilcos-layer-2-firewall-multicast-broadcast-traffic-bypass
Scores
CVSS v3
5.4
EPSS
0.0020
EPSS Percentile
10.5%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
Status
published
Products (5)
Belden/Hirschmann HiLCOS BAT867
Belden/Hirschmann HiLCOS BAT867
< 9.14.5500-REL
Belden/Hirschmann HiLCOS OpenBAT, BAT450, WLC
Belden/Hirschmann HiLCOS OpenBAT, BAT450, WLC
< 9.10.5126-REL
Belden/Hirschmann HiLCOS OpenBAT, BAT450, WLC
< 9.12.5500-REL
Published
Apr 03, 2026
Tracked Since
Apr 04, 2026